Winding mechanism.



Patented Mar. 4, 1913.

4 SHEETS-SHBET 1.

P. W. HEMPELMANN.

WINDING MEGHANISM. APPLICATION FILED MAY z2, 1912.

WfTNEssEs Patented Mar. 4, 1913.

4 BHEET8SHEET 2.

INI/EN TOR.

WINDING MBCHANISM.

F. W. HEMPBLMANN.

APPLICATION FILED MAY 22, w12.

.m ...NNN

WTNESSES: @il @QM F. W. HEMPBLMANN.

WINDING MECHANISM.

APPLICATION FILED MAY zz, 1912.

V 1,055,276. Patented Mar. 4, 1913.

4 SHEETS-SHEET 3.

WITNESSES: INVENTOR.

\ S @25 ff/M F.' vv. HEMPBLMANN.

WINDING MECHANISM.

APPLICATION FILED MAY 22, 1912.

1,055,276. Patented Mar. 4, 1913.

4 SHEETS-SHEET 4.

37C j/d/\ `FREDERICK W. HEMPELMANN, OF CINCINNATI, OHIO.

WINDING MECHANISM.

Specification of Letters Patent.

Patented Mar. 4, 1913.

Application filed May 22, 1912. Serial No. 698,875.

To all whom t may concern:

Be it known that I, FREDERICK IV. HEM- PELMANN, a citizen' of theUnitedStates, residing at Cincinnati, in the county of Hamilton andvState of Ohio, have invented eertain new and useful Improvements inIVinding Mechanism, of which the following is a specification.

My invention relates to machine elements, and has for its -object thecontrol of speed ofl travel of an element being Wound, and compensating,in ratio of driving speed to Winding speed, for the increase inperiplieral Adimensions of the accumulation due to winding.

A further object is to provide for reversal of the winding operationwith synchronous reverse operation of the tcompensating mea-ns duringsuch reversal of the winding operation, and to also provide means forautomatically eiecting the change from the winding operation to thereversal thereof, or vice versa.

The invention consists in the parts and in the details of constructionand'arrangement of parts, as will hereinafter be more fully' describedand claimed.

In the drawings: Figure l is a front elevation of a 'winding mechanismfor the sheet 'of a self-playing musical instrument, Which applicationof my invention I have chosen for illustrating it. Fig. 2 is a plan viewof the same. Fig. 3 is a section on the line -x of Fig. 2. Fig. 4 is adetail of the cross-slide. Fig. 5 is a section on the- `line g/-y ofFigs. 1 and 2, looking to the left. Fig. 6 is a section on the line 2 2of Fig. 2. Fig. 7 is a detail of the end-cap for the main friction-wheelshaft.. Fig. 8 is asection onthe line p-p of Fig. 2, parts being omittedfor lack of space. Fig. 9 is a section on the line g-q of Figs. 1 and 2,looking to'the right. Fig. 10 is a det-ail pian View of one of theslidable cams with its mounting, being represented as having itscover-plate removed. Figs. 5 to 10 inelusive are on a scale'somewhatenlarged l from that of Figs. lto 4, inclusive. vThe showing of theconnections to the mechanis'm of the 'musical instrument proper isomitted forsake of clearness. It will be understood 'that such minordetails may Vary, according to the kind of Vinstrument the mechanism isapplied to.

In the device here exemplifying my iii,-

vention, the perforated sheet l is wound from the upper spool Q onto thelower spool 3 during the rendition of the music, passing over thetracker-board 1I, which has a series of orifices 4 through which air isadmitted when the corresponding perforations 1 of the sheet pass overthem. Through these orifices the air acts, by means of suitablemechanism, upon the instrument, in any of a number of ways familiar tothose skilled in the art of constructing sclf-playing musicalinstruments. When the playing of the piece of music has been completed,the sheet is re-wound ontol the upper spool, for repetition. It iscommonly desired that this re-wintl, and also the repetition, may bestarted automatically, and my invention is concerned with this, as willbe made plain herein. Another very important requirement is that thesheet, during the playing of the music, shall pass over thetrackerboard, at a constantspeed,allowingthe predetermined positions ofthe pertoiations to have accurate control of the time of the music. Itis with this accomplishment that my invention is primarily concerned.

As shown, the spools 2 and 3 are supported in a frame 5, which alsosupports the tracker-board. The lower spool 8 is simply mounted at oneend on a yieldable bearing 3, allowing it to be inserted in the frame,and makes engagement at the other or driving end with a main arbo-r 6,journaled in a bearing 6 in a plate 7 that is fastened to the outside ofthe frame 5, said bearing projecting through the frame atl this point..The upper spool 2 is mounted at one end on a yieldable bearing 2, and atits driving end on a re-winding arbor 8, likewise journaled in a bearing8 in the plate 7, projecting inside the frame 5. The mounting of theupper spool is illustrated in detail in a spring 2f" in a casing 2around its stein 2. that extends through the rear end of the casing andhas a knob 2W lfor taking hold to manipulate thebearingduringinsertionofthe spool as may well be understood from inspection of the drawing.The lower rear bearing 3 is identical with the upper one,

having, as may be seen in Fig. 1, a plunger and having a casing 3bfromvfhioh the stem 3a protrudes with the knob 31 thereon.

The upper driving-endmounting is diifer ent from the lower driving-endmounting chiefly in that the upper one is adjustable so that the upperspool may be accurately alined with the lower spool. Thus, the rewindingarbor S is hollow throughout, and has its bore somewhat enlarged at itsrear end, to receive the forward spindle 2 of the spool 2. A diametralAslot 8 crosses this enlarged spindle-receiving part of the bore, openingfrom the rear end of the shaft, and receives diametrically extended'lugs 2 on the spindle.V The slot 8 is long enough to allow enoughmovement of the lugs 2 therein to provide the desired adjustment of theupper spool with respect to the lower one; The re-winding arbor 8 hasanother enlargement to its bore at its forward end, and this is threadedand receives an enlarged threaded part of a pin 8a that extends itsunenlarged part through the unenlarged -part of the bore in .the arbo-r,and engages' its end with the end of the spindle 2 of the spool 2. Theforward end of this pin 8a has a knob 8a, and by turning the pin toscrew it in or out, thespool 2 will move longitudinally, against or withthe pressure vof the spring 2a at the rear. The lower main arbor 6receives the spindle 3 of the lower spool 3 in the manner abovedescribed, but there is no pin for adjusting the spool. It vwill be seenthat with the abovedescribed mountings the spools willlbe rotated withtheir respective arbors, but may be removed and like spools withdifferent perforated sheets inserted, which is 'a requirement peculiarto self-playing instruments here illustrated. l i

For driving the sheet 'on its downward i travel, -to play the music,.themain arbor 6 has a spur-gear 9 fixed o-n it outside the bearingv 6, andfor re-winding the sheet, the re-winding arbor 8V has a spur-gear 10 xedon it outside the bearing 8. Collars 6 and 8 inside the bearings,prevent end play of the arbore 6 and 8, respectively.

The gear 10 of the re-winding arbor has a sheave 10a integral with it,by means of which it is screwed to the arbor, and a shoe 10b bearsonthis sheave during the downward travel of the sheet, to prevent racingof the upper spool. A fiat spring 6 bears y on the gear 9, below, tosimilarly control the lower spool during the re-winding. This fiatspring is allowed to bear constantly, but the shoe 10b, above, iscontrolled so as to be released from engagement with the sheave 10nduring thevre-winding, aus will presently be explained.

. `For driving `the 'mechanism, either in playing or re-Windnig, a'disk11 '1s mounted' on a shaft 12 journaled transversely in. the stationarybracket 13, which may be fixed on the structure of the instrument inwhich the mechanism is used, as may also the frame 5 that supports thespools. A pulley 14 is xed on the shaft 12, and a'belt 15 passestherearound and around'the pulley 16 of a ino-tor. As shown, for sake ofsimplicity, thisl motor has another pulley 17 that dri'es suitablebellows 18 for exhausting air from a chest 19, thro-ugh a pipe 20. Thissimple arrangement may represent any suitable pneumatic apparatus of almusical instrument, and is suflicient for illustrating the details kofmy invention, as, they are to be described. i

Mounted on the stationary bracket 13, on a longitudinal stud 13a fixedin the bracket, is a tiltable bracket 21, held on the stud 13a by acollar 13a. This mounting is best shown in Fig. 6. This bracket has twomain uprights 21a and 2lb, suppo-rting the main friction wheel 22 at oneside of the disk 11,v and it has a third upright 21c which supports there-winding friction-wheel 23 at the other side of said disk. Thebracket, on tilting, with the stud 13a as a pivot, will' bring one orthe other of the friction-wheels 22 and 23 into engagement with theadjacent face of the disk.

Referring again to Fig. 6, the main friction wheel 22 is journaled on astud 22a ixed in the upright 21, and extending about half the distanceto the other upright 211. A square shaft 221 has a reduced part 22"journaled in a bore 22a in the free end of the stud 22, and this squareshaft has another reduced part 22" `journaled in the other upright 21".The friction-wheel 22 has an elongated hub, which has a circular openingthroughout, so that said wheel ,can slide the full exposed length ofsaid stud 22a and turn thereon as it slides. To cause it to turn withthe square shaft, which also enters the circular bore of the wheel-hub,a cap 22c is screwed onto the end of the hub, with a square hole thataccurately engages with the square shaft and slides therealong. Thus, itwill be seen that the friction-Wheel 22 may engage with the face of thedisk 11 throughout a considerable part of the radius of the disk, andthe speed at which the friction-wheel is rotated by the disk will varyaccording to the 'position of the engagement. By sliding thefriction-wheel at a given speed along its bearings, the speed of thefriction-wheel may vary gradually, in exact accordance with its sliding.Aconnecting shaft 24 has a universal joint 24 with the square shaft 22,and has another universal joint 24h with a small spur pinion 25 that isadapted to mesh with the spur gear 9 of the lower spool mechawill bedescribed presently.'

The re-windlng traction-wheel 23, best seen in Fig. 2, is simply mountedon a stud 23 in the third upright 2l, the wheel hav ing an amply longhub to att'ord it a proper bearing on its stud, upon which it turnsloosely, having suitable means to limit end play, not deemed necessaryof detailed illustration herein. No longitudinal movement of thisre-winding wheel is needed, it being merely mounted near the peripheryof the disk ll to impart to it the highest speed the disk aLf'liords,since the re-winding is to be performed in as short time as practicable,without concern as to the uniformity of speed of travel of the sheetupwardly. It will, of course, be understood that the musicproducingmechanism is disconnected during the re-winding, as is well known tothose skilled in the musical mechanism art.

A connecting shaft 26 has a universal joint 26 with the hub oi. thewheel 23, and has another universal joint 2Gb with a spur pinion 27 thatis adapted to mesh with the spur gear l0 of the upper Yspool mechanism.This pinion 27 along with the before-'men- `tioned pinion 25, isjturnaled in a slidable bracket 28, best seen in Fig. 9, each pinionbeing fixed o-n a short shaft 27n or 25, to which the universal joints26b and 24" are fixed, respectively. This bracket 28 slides verticallyin guides 28*l on the plate 7, being held therein by screws 28 takingthrough slots in the bracket. Vhen the bracket slides down, the pinion25 meshes with the gear 9, to drive the lower spool; and `when thebracket slides up, the pinion 27 meshes with the gear'lO, to drive theupper` or rewinding spool. l/Vhen either pinion meshes the otherunmeshes. vAs shown, the ratio between the lower gear and pinion is muchgreater than that between the upper gear and pinion; this provides therequisite slowness ot playing' travel of the sheet, and the needed speedof re-winding travel, in'I addition to the provisions for the ratio ofthe main friction-wheel and of the re-winding friction-wheel,respectively, to the disk Ill.

In meshing the gears and pinions, as just described, it is necessary toprovide for the contingency of the teeth of a gear and pin-l ionmeeting` end-on, and thus damaging the mechanism before they can slideout of such engagement into their proper meshing'engagementfby theturning of the pinion. I provide for this lby yieldingly engaging thebracket to move it. Thus, the extension 28" on one side of the slidablebracket has a lug 28V, and a vertical slide 29 has a stirrup 292L thatreceives this lug and engages it with helical springs 29 and 29 aboveand below respectively. These springs yield enoughto prevent damagingvstrain in the contingency above mentioned, but are firm enough tomaintain the gears and pinions in mesh `for performing ytheir/work.

bracket and engaging with the under side of said shoe. The shoe isengaged with the` i sheave by the-pull of a helical spring 10b',

attached to the under side of the shoe by one end and to a lug on thestirrup 2911 of the slide 29 by the other end.

While, as above described, the meshing of the pinions25 and 27 withtheir respective.

gears-9 and 10 is done by yieldable engagement, the tilting of thetiltable bracket 2l, to engage either of the friction-wheels 22 and 23with the disk ll is, on the contrary, done by positive engagement,which, however, is made adjustable, so that exactly the right pressureofeither friction-wheel may be maintained against the disk. complishedby a cross-slide 30, with a stirrup 30, at the sides of the opening ofwhich are lugs 30 and 30, in which are set-screws 30C" and 30D',pointingtoward each other acrossI the opening. forms part ofthe'tiltable bracket 2l, near the periphery of the disk 11, and it has alug 21W that extends into the opening of the stirrup 30 of thecross-slide 30, to be engaged by one or the other of the set-screws 30;"and 30', accordingly as the frictionwheel 22 or the friction-wheel 23 isto be` engaged with the disk. A slight amount of lost motion will thusbe involved, but the important requirement is that these set-screws beso adjusted at alltimes as to provide the required frictional engagementto impart the exact speed of any part of the face of the disk to theperiphery of the friction-wheel. Such adjustment also will enable theslight wear of the friction wheels to be compensated, from time to time,although this wear is very slight, and will necessitate quentadjustment.

The friction-wheels 22 and 23 may have their peripheres composed ofsuitable ber composition, well known in the art of frictiontransmission. These friction-wheels, with the engaging means abovedescribed, are found, in practice, to accurately transmit the motion ofthe disk, with no perceptible loss of motion. This dependence upon theuniform coperation of the main frictionwheel 22 is an importantfactor inthe success of my invention, as will later be made plairt r For shiftingthe slidable bracket 28 and tilting the tiltable bracket 21simultaneously,

their respective slides 29 and 30 are provided' with slidable cams 31and 32, respectively, connected by a strut 33, so that the two cams movea unit. Swivel studs 31 and 32', respectively, are provided on th'e cansto receive the strutl for *proper adjustment, it be- This is ac,-`

no"A fre-f ing held in the studs by set-screws. The slidable cam 31 forshifting the slidable bracket- 2S is mounted in a guide-block 31, whichis attached to the plate 7 on the side of the frame 5, by means ofacleat 311. This guide-block has a cross-slot in which the'vertical slide29 is accurately guided, the guide-block being mounted with itscrossslot vert-ical to receive the vertical slide. This vertical slidehas a detent 29D that receives an inclined reduced part of the slidablecam 31. This vinclined reduced part joins the main part of the cam ateach end of said reduced part by a straight part. Either one or theother of said straight parts occupies the detent 29", to hold thevertical slide up or down, as the case may be, and the passage of theinclined part through the detentraises or lowers the vertical slide,thus converting the motion of the slidable cam Ainto motion of thevertical slide, at rightangles to the motion of the slidable cam.

The sides of the detent 2,9b are, in their major part, conformed to thestraight parts of the cam, to'provide for ample locking en.

gagement withsaid straight parts. Minor parts of said sides, however,are inclined to conform to the inclined part of the cam, thus receivingthe wear incident to the shifting. The straight parts of the cam are aslong as the vertical slide is in thickness, so that there is some lostmotion until .the inclined parts engage. These details are readily seenin E ig. 10. A cover-plate 31c is secured to the guide-block 31, overthe cam and the vert-ical slide.

The slidable cam 32 is identical in its construction and mounting withthe cam 31, except that the guide-block 32, somewhat modified, ismounted horizontally, on the stationary bracket 13, over the bearing ofAvthe shaft 12. The cross-slide 30 is accurately guided in the cross-slotin the guideblock 32a, and has a detent 30b receiving thereduced vpartof the cam, and acted upon by said cam as has been described inconnection with the vertlcal slide 29. The inclined parts of the twocams 31 and 32 are, as shown, oppositely directed, to effect the propersimultaneous operation of the vertical slide and the cross-slide,respectively. The. guide-block 32a has a cover-plate 32.

It is highly desirable that the shifting of the mechanisms from playingto re-winding operationand vice versa be effected auto` matically, instrict accordance with the conditions imposed by the particular sheetbeing'carried. This is best effected by utilizing a. pneumaticallycontrolled device, actuated, in each instance, by the presence of a slotover an orifice in the tracker board. carry o-ut this by mount-ing onone of the cams, in this instance on thercam 32, a pair of bellows 34and 35, wit-htheir expansible ends facing each otl'ier, and pivoting apair of pawls 34a and 35:L respectively on said cam, to be actuated bythe respective bellowsI into and out of engagement with a stud 36 on aconstantly reciprocating bar 37, vas is best shown in Fig. 3. Thesebellows and pawls are mounted on the lower side-of the cam 31, which isextended for the purpose,

lthe pivots of the pawls being at the inexpansible ends of therespective bellows and being heavy enough cured to the cani to withstandthe somewhat heavy impact from the stud and thus transmit it to theshifting mechanisms. The engaging ends of the pawls are somewhat'con--cave to counteract any tendency of the pawls to slip away from thest-ud, but the lower edges of said pawls are inclined upwardly fromthese engaging ends toward the pivots, so that when a pawl comes down,on the expansion of its bellows, and engages this lower edge with thestud 36, no operative engagement will occur here. In such event, thepawl is raised until the stud is reciprocated from under it, and thenfalls again to have its end engaged by the stud as it returns on itsnextreciprocation. Each bellows has two openings to its interioig and 34and 35 and 35, respectively. Tubes 341 and 351 lead from the openingsSet and 35 to the chest 19, in which vacuum is maintained by the bellows18, before described; and ltubes 34e@ and 35c lead from the openings 34Cand 35 to orifices 3&0 and'35c in the trackerboard. The sheet 1 has aperforation 3io,

which is shown in the drawing as being overthe orifice 346'; it will beunderstood that the sheet 1 shall have another perforation, nearthe-other end of the sheet, which understood as being wound upon theupper spool Q shown in the drawing, and that this other perforation isnear the other side of the sheet, to come over the other orifice 35Cwhen the playing of the piece of music has been completed. As shown, there-winding has just been completed, and the mechanisms have been shiftedto begin the playing operation of the sheet. This device operates by thecessation of the vacuum which was maintained throughout the tube fromthe vacuum chest, the respective bellows on the cam, and the tube fromthere to the trackerboard; this cessation occurring as soon as theperforation in the sheet comes over the orifice, admitting atmosphericair to the above described spaces, which air excluded as longl as theimperforate part of the sheet ran over the orifice. The rush of air intothe spaces, destroyingthe vacuum, allows the pawl attached to theIbellows to be forced down by the fiat spring 34d or 35,

and rigidly enough sehad been inside the bellows 34,- or 35, as the casemay be. Then, the stud 3G engaging with the awl that has dropped, thcmechanisms will be shifted at. once, after which, the perforat-ionleaving the orifice and the imperforate l lation -\With the The major anywill be raised again.

vmechanism, .which is the l tion, l

Y the` other details, excepting to mention thatv parts of the movingsheet closing the orifice again against atmospheric pressure, the airwill' again be exhausted from the spaces, the bellows will againcollapse, and the pawl Each pa-wl has a llug 34a or 35a adjacent itspivot, to limit the drop of the pawl. It will be seen that all strain isconfined to the pawls, and the bel lows need only perform Athe duty ofcontrolling the positions of the pawls. The springs 34d and 35d may bedispensed with where the pawls are heavy in comparison to the efficacyof the vvacuum maintained; thus, the pawls may drop of their own`weiglit,\aiid the effect of the vacuum need be only to overcome saidWeight. The bar 37 is reciprocated by a'pitman 38 on a wrist-pin 39 inthe pulley 14, said pitman being also connected to a block 40 rigid onthe bar 37 `between the two bearings 37 and 37 of the bar, in thestationary bracket 13 and on the vguide-block 32". The stroke of thisbar 37 is such that it equals the required movement 0f the cams 31 and32 plus the distance between tlie engaging ends of the pawls 34 and 35aminus the diameter of the stud 3G. Thus, when the stud has pushed thecam to the limit of its stroke in either direction it cannot act furtherin that direction, and the pawl may be raised at leisure, during thereturn travel of the sheet, either playing or rewinding. In actualpractice,'but a small fraction of the time t-hus allowed is required forthe vacuum to be restablished and the pawl returned to its raisedposition. The outer end of the extension of the cam 32 is supported fromthe strut 33 by a brace 33, the head 33" of which may slide on the stiutto allow the adjustment of the strut as before mentioned. It will beseen that by this combination ofV pneumatic and vmechanical action, theintimacy of relation with the pneumatic action of the sheet is obtained,while the powerful and certain action of the driving mechanism isutilized under the accurate control assured neumatic4 action.

minordetails of the driving and reversing mechanism ofimy inventionbeing described, the compensating crux of the invenand whichdias notbeen confused with ytheiniain friction-wheel 22 is slidable across theface dft the disk 11, inaylnow ybedescribed with facility, and itsrelation to the other 4factors clearly demonstrated.

. The'friction-:wheel 22, slidable on its stationaryestud22a 60 andsquarefshaft 22,", and turning the latter at such speed a's this wheelderives from contact with the face of the disk, has annular lianges 22don its hub, and a key 22c fits accurately between these flanges at oneside.

4held in a slot 46 by such intimate re- Thisy rotation mayT be repeateduntil t This key is carried in a head 22,'.inounted on a slide-rod 22,slid-` able in brackets 22g on the upiiglits 2l and 2lb of the tiltablebracket 21.

The main arbor 6, of the lower spool 3, is extended forwardlyandjournaled in an arm of a bracket 4l, mounted on the lower part of theframe This arbor G has a worm 42 fixed on it, and this worm meshes witha worinwlieel 43, fixed on a shaft 44 journaled transversely in thebracket 41. On'the end of this shaft 44 is fixed a spiralcam 45, havinga spiral groove 45 cut in its face. Another extension of the bracket 4lcarries a pivot for a bell-craiik lever 4G, one arm of which extendsacross the spirally grooved face of the cam 45 and has a stud 46ientering the spiral groove. The other arm of this lever extends up andconnects, by a suitable pitinan arrangement 47, to the slide-rod 22thatcarries the head 22 with the key 22e engaging in the space betweenthe annular fianges 22d on the hub of the friction-wheel 22.

The pitrnan arrangement 47 the pitman-rod 47 47b that is pivoted to theslide-rod 22g 'and depends therefrom, said pitman-rod-being adjustablyheld therein by avset-screw, allowing the pitman arrangement to beadjusted in length. Furtherlongitiidinal adjustment is provided bymounting the head 22 on theslidefrod 22g by thumb-screws 22 takingthrough slots in a lower widened part of the head. Thus the head, withits key, and coiiselluently the friction-wheel 22 itself, may beadjusted longitudinally with respect to tli'e slide-rod 22g, and tlieslide-rod may-besimilarly Aadjusted with respect to the 4bell-cranklever 46. The other end 0f the pitman-rod 47a has a head 47( whichcarries a clamping-stud to be adjustably longitudinally of the arm ofthe lever 46, near the upper end of said arm. By this means, themovement of the friction-wheel 22 relative to the movement of the studin the spiral groove 45a may be adjusted. i

The key 22"- in the head 22' is preferably made of hard fiber, so thatit will wear rather, than the lflanges22d. This key, as shown, is madeequilateral, and mayl'be' re movedfrom its socket in the'head 22 androtated one-quarter turn, to present a new surface to the flanges22d-when it has become worn excessively on lthe firstedge ie four edgeshave been presented for use, and then may be renewed. lA screw 22epasses centrally through the key and throughthe sides of the head, tohold the key in'the socket. l i

It will be noted that the drawings illustrate the mechanism with thewinding of the sheet onto the lower spool in its inception. Thus, 4themaximum speed has been' utilized'here, and is gradually diminishingcomprises as the travel of the stud outward in the spiral groove 45causes the friction-wheel 22 to approach the center of the disk 11. rI`he spiral. groove 45a is virtually a modiiication of the volutions ofthe sheet asit is wound on the spool-modified in that the number ofturns of the spiral are reduced from those of the sheet, and the radialdisplacement which each turn effects is magnified proportionately, withthe speed of rotation of the spiral-cam 45 relative. to that of thespool 3, and the ratio between the frictionwheel and the disk, takeninto consideration. The reduction of speed from spool to spirall cam bymeans ot' the worm and worm# .meshingthe pinion that drives the lowerspooiand the spiral cam, and disengaging the friction-wheel 2Q from thedisk 11, the

' upper spool 2, unwinding the sheet from the lower spoolA 3, will, bydriving this lower spool, drive the spiral-cam backward, and the studwill travel radially-inwardv in the spiral groove 45a. This willv returnthe friction-Wheel 122 to the exact position tor its rengagement withthe disk l1, when the re-winding is completed and the playing operationis tov begin again, so that, in thisv position, it will again begin torotate the lower spool 3 at the proper speed for the correct renditionofthe music.,

Variations to secure diierences in speed of travel of the sheet may bemade with the "various adjustments described, but the constant speed ofthe sheet will be lnaintained at any adjustment, in the playingoperation.

It will be understood that, while I have described in detail theapplication of my invention to the operation of a. self-playing musicalinstrument, it also will be understood that it is applicable, with suchvminor modifications as may be found necessary. or

desirable, to variousl other uses, wherever such compensation of drivingspeed during winding of an element is needed.. Therefore, while I haveillustrated and described my specific application of my invention hereinin detail, I do not wish to be understood as limiting myselfto theprecise dey tails thus set forth; but

YWhat I claim as new and vdesire to secure by Letters Patent is:

1 A In Winding mechanism, in combination with, an element to be.. wound,-a rotatable face, Wheelfrictionally engaging the face whereby theinding of the velement, is et- 'fected by the rotation of the Jface,throughsaid wheel, compensating means, actuated in accordance with thewinding of said element, to move said wheel across said face while inengagement therewith and while rotated thereby, and means, actuatedthrough the driving of said element, for disengaging said wheel fromsaid face and reverseiy act-ing upon said element and reversely act-`ing upon said compensating means through said element. A

' 2. In winding mechanism, in combination wit-h an element to be wound,a rotatable face, a wheel rictionally engaging the face 4whereby thewinding of the element is effected by the rotation of the face, throughsaid wheel, spiral engaging means rotated in v'accordance with thewinding of said element, and connection between said spiral enf gagingmeans and said wheel, to move said wheel across said face while inengagement therewith and while rotated thereby.

3. In Winding mechanism, in combination with an element to be wound,rictionally engaging means for driving said element, and volute guidingmeans actuated in accordance with the winding of said element, to varythe conditions of engagement of the driving means.

4. In winding mechanism, in combination with an element to he wound`frictionaliy engaging means for driving said element, volute guidingmeans actuated in accordance with the winding of said element-, to varythe conditions of engagement of the driving means, and means 'fordisengaging the driving means and driving said element reversely, andthereby acting reversely on said volute guiding means.

5. In winding mechanism, in combination with an element to be wound,frictionally engaging means for driving said element, volute guidingmeansl actuated in accordance with the winding of said element, to varythe conditions of engagement of the driving means, means for disengagingthe driving means and driving said element reversely, and thereby actingreversely on said volute guiding means, and means whereby said elementcontrols the action of said disengaging and reversing means.

6. In winding mechanism, in combination with an element to be wound,frictionaliy engaging means tor driving said element, volute guidingmeans and connection therefrom vto said driviing means, whereby theguiding means changes the conditions of frictional engagement of said"driving means, a worm-wheel Awith which the volute guiding meansrotates, and a worm turning with the element being wound and in meshwith said wormwheel. K

7. In winding mechanism, in combination lwith an elementI to' be wound,rictionally engaging means for driving said element,

volute guiding means actuated in accordance with the Winding ot' saidelement, to vary the conditions of engagement of the driving means, andmeans t'or regulating the degree of variation imparted by said guidingmeans.

8. In winding mechanism, in combination `with 'an element to be wound,frictionally engaging'means for driving saidA element, volute guidingmeans actuated in accordance with the Winding of said element, and meansfor regulating the relative positions ,offsaid driving means and saidguiding means.

9. In Winding mechanism, in combination with an element to be Wound,frictionally engaging means 'for driving' said element, volute'gu'idingmeans actuated 1n accordance with the winding of said element,

meansfor regulating 'the' degreeof jvari ation imparted by said guidingmeans, and means `for regulating the relative positions of said drivingmeans and said guiding means.'

10. In winding mechanism, in combination with an element to be wound, arotata ble lface, a friction-wheel engagingthe face and slidable acrossthe face while rotated thereby to drive said element, volute guidingmeans actuated in accordance with the Winding of said element,connection from said'guiding means to the slidable friction wheel, andmeans for regulating the length of said connection.

11. In Winding mechanism, in combination with an'element to be woundarotatable face, a friction-wheel engaging the face and slidable acrossthe face while rotated thereby'to drive said element., volute guidingmeans actuated in accordance Awith the Windingof said element, a leveractuated by said guiding means, connection from said lever to saidslidable friction-wheel, and means for adjusting said connection withrespect to said lever, Wherebythe degree roi sliding of saidfriction-wheel is controlled by -said lever under the guidance of saidvolute guiding means.

In winding mechanism, incombina- .tion With an element to be Wound, arotatable face, a frictionwheel engaging the face and slidableacross theface while rotatedthereby to drive said element, volute guiding meansactuated in accordance with thewinding ot' said element, a Ileveractuated by said guiding means, connection .from saidI ,leverY to ysaidslidable friction Wheeh/means for adjusting said connection with respectto said lever, whereby thedegree ot shding et sald friction wheel iscontrolled by said lever under the guidance of said volute guidingmeans, and means for adjusting said connection whereby the relativepositions of said friction-wheel lated.

I3. In Winding mechanism, in lcombinaand said lever are regu-C.Justa'hle tion with an element to be wound, a rotatable tace. afriction-wheel engaging the tace and slidabl across the iace whilerotated thereby to drive lsaid element, volute guiding means actuated inaccordance with the winding of `said element, a bell-c 'ank leveractuated through one ot' its arms by said volute guiding means, aslide-rod adjacent said friction wheel. a head longitudinally adjustableon the slide rod and means whereby said head slides 'saidfriction-wheel, a pitinan pivotally and longitudinally adjustablyconnected to said slide-rod,`and clamping means on said pitman, saidbell-crank lever having a radial slot in its other arm, in which saidclamping means engages and adjustably and pivotally connects said pitmanto said arm, for the purposes set forth.

14. .ln winding mechanism, in comhinatien lwith an element to be wound,a rotatable tace, a friction wheel engaging' the face, an elongated hubon the friction wheel hav- .ing a bore of circular cross-sectionthroughout itsI length, a stud of circular cross section received insaid bore, a shaft ot angular cross-section also received in said boreand meeting and being supported by said stud therein, connectionhetweensad shaft and the clement to be wound, whereby the clement isdriven, anda cap on thc end ot' the elongated hub ot thc friction-wheelhaving an opening fitting on said shaft whereby said friction wheel isturned with the shaft but may slide therealong and along said` stud, andmay have its main bearing on said stud, said triction-wheel being thusadapted to slide under the guidance ot' means actuated in accordancewith the winding of said element.

l5. In winding mechanism, in combination with an element to be wound,and with conipensating means actuated in accordai'ice with thewindingot' saidelemcnh'a .rotatabiefacc, a frictionwvheel slidablymounted to rotate with the Ataceby engagement there- Iwith butto` moveacross s aidfacc, a lhub on engaging between saidtianges, whereby saidhead slides saidwheel asmoved by the compensating means, said key beingad! in said head to present. tlitt'erent parts of its surface betweensaid tiangcs, for the purposes set rforth. 1 1,

lo. .ln winding` mechanism` in comhination with anelelncnt to be wound,and with compensating means actuated in accordaiue with the A.winding ofsai ble'tace, a friction-wheel slidahly mounted to rotate with the t'aceby engagement therewith but to move across said tace, a Stud on whichsaid wheel is journaled and is longit-urflinally lslidable, and a shafton which said wheel is.longitudinally slidahlebut d element, arotatawhereby it is rotated in accordance with the winding of saidelement, for the purposes set forth.

18. In winding mechanism, spools, an element Wound from either spool totheV other, a rotatable face, a friction-wheel engageable with said faceto be rotated thereby but to move across said face, connection from saidfriction wheel to one of said spools allowing said movement across saidface, volute guiding means rotated in accordance with the rotation ofsaid one of said spools, and connection from said guiding means to saidfriction wheel, moving it across said tacebut allowing it t'o rotatewith the face.

19. In winding mechanism, spools, an element wound from either spool tothe other,'a rotatable face, a friction-wheel engageable with said face,a stud on which the frictionwheel rotates but is slidablev to moveacross said face, a shaft on which the 'friction- -n'heel is alsoslidable but which rotates with the friction-Wheel, connection from saidshaft to one ot said spools, aspiralcam, a worm-wheel with which the camrotates, a worm meshing with the worm-wheel and rotating with said oneof said spools, a lever, a stud on the lever engaging with the spiralcam, a head engaging said friction-wheel to slide it but to all-ow it torotate, .guiding means tor said head, and connection between said headand said lever,rfor the purposes set forth.

9.0. In winding mechanism, spools, an element wound from either spool tothe other,

frictional Yengaging means l`'with variable driving connection'to one ofsaid spools, compensating means actuated in accordance with the drivingof said one of said spools, frictional engaging means with drivingconnection with the other spool, means for alternating the differentfrictional engaging means, and connection between said compensatingmeans and the rictional-engaging means that has variable drivingconnection, said compensating means being actu ated reversely during theaction of said frietional engaging means driving said other spool,through said element being wound.

21. In winding mechanism, in com ination with an element to be wound,driving means for the element alternately friction ally engageable todrive said element in one directionor the other, and intermeshng 001i-,

necting means between the driving means and the element, alternatelyengageablesimultaneously with the alternate frictional engagement, forthe purposes set fort-h. l

22. In winding mechanism, in combination with an element to be wound,driving means for the element alternately friction ally engageable todrive said element in one direction or the other, alternately engageableintermeshin-g connecting means between the driving means and theelement, means for positively engaging the 'rictionally engageablemeans, and means for yieldably engaginc` the intermshing means.

23. *In winding mechanism, in combination with' an element to be wound,driving means for the element alternately frictionally engageable todrive said element in one direction or the other, intermeshingconnecting means between the driving means and the element, alternatelyengageable simultaneously with the alternate friet-iena] engage?. ment,means for positively engaging the frictionally engageable means, andmeans` for 'yieldably engagingV the intermeshing means.

24. In winding mechanism, in combina@ tion withhan element to be wound,driving means for the element alternately frictionally engageable todrive said element in one direction or the other, alternately engage.

able intermeshing connecting means to the element, and articulatedconnection between the intermeshing connecting means and thefrictionally cngageable means.

Q5. In winding mechanism, in combination with an element to be wound,driving means and connecting means from the driving means to theelement, each of said means .being shiftable at an angle to the othertoal.

ternately drive said element in one direction or the other, andarticulated connection be tween the driving means and the connectingmeans. for the .purposes set forth.

26. In winding mechanism, in combination with an elementto be wound,driving means and connecting means from the driving means to theelement, both of said meansy being alternately operative simultaneously;

to drive said element in one direction or the other, and compensatingmeans, actuated through the winding of said element during thevdrivingin either direction, and vvarying the conditions of operation of thedriving means. or returning said driving means through the variations,accordingly as it is actuated through the winding of said,l element inone direction or the other.

27. In winding mechanism, in combinanl i tion with an element to bewound, driving means and connecting means from the driv` mg means to theelement, both of said r'neans being operative sinmiltanecmsly` to drivesaid element in one direction or the other, and compensating means,varying said driving wheels and said element Wherebyeach will.

drittethe element in an opposite direction. y

29. In winding mechanism, in combination with fan elementto be wound, astationary-bracket, a rotatable driving element mounted therein,a-tiltable bracket, enga ing meanscarredby the-tiltable bracket aternately engaged with the driving element as the bracket is tilted inone vdirection or the other, and connection between-'said en agin meansvand said element 4whereby eac Wi drive the element in an oppositedirection.

" 30. In winding mechanism, in combina'- tion with an element to bewound, a stationary bracket, a rotatable driving element mountedthereina tiltable bracket, engaging means carried by the tiltablebracket alternately engaged with the-driving .element as the bracket istilted in' one direction or the other, a slidable bracket,and'connection from the res ective engaging means ,on the tiltable braet, carried by said slidable bracket and alternately engaged simultaneonsly with., thealterna'te engagement of said engaging means, by thesliding of' said bracket, to drive said element in one. direction or theother, for the purposes set forth. i

31. In winding mechanism, yin combina?v i tion with an element to bewound, a stationary bracket, a rotatable driving disk mounted therein,atiltable bracket, 4enga g means carried by the tiltable bracketald-ii'- nately engaged with the driving disk as the bracket is tiltedin one direction or the other, a slldable bracket, connection from the4respective engaging means on the tiltable bracket alternately engagedto drive said ele# ment in one direction or the other, bythesliding ofsaid bracket, and connection be,- twee-n said tiltable bracket and saidslidable bracket whereby they yare moved simultan"- ously, for thepurposes set forth.

32. ln winding mechanism, in combination with an element to be wound, agstationarv bracket,- a rotatable drivingA disk mounted therein, atiltable bracket, friction wheels rotatably mounted on, the tiltablebracket and alternately engageable with said driving disk as the bracketis tilted in one direction or the otheiga slidable bracket, in,termesliing connecting means to saidelement, carried by said slidablebracket and alternately intermeshed `to drive said 'clement one way orthe other as the bracket is shifted, articulated connections between thefriction-wheels and the respective intermeshing means, and connectionbetween the tiltable. bracket. and` the slidable bracket whereby theyaremoved simultaneously, for the purposes set forth.

33. `In winding mechanism, in combinaing means,frictionallyngageablemeans to alternately engage with said driving means, and inter-meshingmarmitte alternately connect with-saidrelement, articulated connectionsbetween-res yctive ones of the fric; tionallyy engageab e means,v andthe intermeshing '-means,l andmeans for 'alternately engagingandintermeshingthe thus connected means-,to 'drive said element in onedirec i 319.111 winding mechanism,'in combina tion -with an elementto'be wound, and driving means, -frictionally engageablemeans toalternately engage with said driving means, intermeshin means toalternately connect with saifie ement, articulated 'connections betweenrespective ones of the frictionally engageable means and 'theintermeshing intermeshing' the thus connected means, one of thefrictionally engagcable means being capable of variation in itsfrictional engagement, and. compensating means, actuated in accordancewith the winding of said element, connected to said variablefrictionally enor the other as the respectiveengagmg and intermeshingmeans arel engaged and interactuated in either direction, in accordancewith the driving of said element, for the ypurposes set forth. y

35..,In winding mechanism, in combinationv with an elementl to be wound,alter- `nately frictionally engageable driving means, one of `whichtinaybe varied in its .frictional engagement, meansy whereby either drivingmeans is connected with said element dil'rectly only when' it is engagedfor driving, each-drivlng means driving the element in oppositedirection, and compensating means, actuated in' accordance with thewinding of said element under the driving action of said variabledriving means, and connected to this driving means to vary it, saidcompensating means being reverselyl actuated when said element is drivenby the other the purposes set forth.

.136. In windingmechanism, in combination with an element to be wound,alten natelv enagageable driving means therefor,

shifting means to alternately engage said driving means,` andcontrolling means for tion withanelement' to be Wound, and driv.

tion'or the othexg'for the purposes set'forth..

meshed, and said compensating` means beingA means, means for alternatelyengaging and gageable means, to vary said engagement, said element beingdriven in one direction driving means in an opposite direction, for' are-Winding spool, arbors for the respective spools, spur gears iXd onthe respective arbors, a sheave turning with the rewinding arbor, a shoebearing on the sheave, a slidable bracket mounted between the arbore,shafts journaled in the'bracket and'pinions on the'respective shafts toalternately mesh with the gears onv the respective arbors as the bracketis shifted, a spuron said bracket to engage with the shoe and disengageit from the sheave on there-Winding arbor when the pinion meshes witht-he gear en said re-winding arbor, and a spring connected to said shoeto engage it With said sheave.

39, In Winding mechanism, a main spool, are-Winding spool, a `frame,yieldable bearings for the spools in the frame, a main arbor for themain spool, a re-Winding arbor for the re-winding spool, means forengagement and disengagement of said spools with their respective arborsas permitted by their yieldable bearings, and Whemby said spools are,rotated by said arbore, said rca-Winding arbor having a central bore,and a pin screwed into said arbor through said bore, engaging to adjustsaid re-Windingspool axially.

In testimony whereof i have signed my irame to this specification in thepresence of two subscribing Witnesses.

FREDERICK W. HEMPELMAN.

Nit ,esses CLARENCE PERDEW,

JAMEs A. BALDWIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of atent's,

` Washngton, D. G.

